Fire-alarm.



H. H. BROWN, DECD.

J. G. SASS]. ADMINISTRATOR.

FIRE ALARM.

APPLICATION FILED MAYI4,1914- 1,17%379. Patented Apr. 4., 1916.

a 2 SHEETS-SHEET 1. & a 2i J THE COLUMBIA PLANOGRAPH CO-, WASHINGTON, n.C.

H. H. BROWN, DECD.

I. G. SASSI, ADMINISTRATOR.

FIRE ALARM.

APPLICATION FILED MAY 14, 19M. 7 1 178,379, Patented Apr. 4, 1916.

2 SHEETS-SHEET 2.

THE COLUMBIA PLANOGRAPH c0., \VASHINGTON. n. c.

QFFTQE,

HARRY H. BROWN, OF YORKVILLE, SOUTH CAROLINA; JOSEPH G. SASSI ADMINIS-TRATOR OF SAID BROWN, DECEASED.

FIRE-ALARM.

Specification of Letters Patent.

Patented Apr. 4, 1916.

Application filed May 14, 1914. Serial No. 838,528.

To all whom it may concern:

Be it known that LHARRY H. BROWN, a citizen of the United States,residing at Yorkville, in the county of York and State of SouthCarolina, have invented certain new and useful Improvements in Fire-Alarms, of which the following is a specification.

This invention relates to fire alarms, and the primary object of theinvention is the provision of a fire alarm as specified, which isoperable upon the breaking out of fire in any part of a building, forsounding an alarm and acquainting .persons of the existence of the fire.

Another object of this invention is the provision of a novel type ofgoverning mechanism for controlling the operation of the signal soundingmechanism.

With the foregoing and other objects in View, this invention consistsinsuch novel features of construction, combination, and arrangement ofparts as will be hereinafter more fully described, illustrated in theaccompanying drawings, and claimed.

In describing the invention in detail, reference will he had to theaccompanying drawings, wherein like characters designate like orcorresponding parts throughout the several views, and in which Figure 1is a central sectional view through the supporting casing of theimproved fire alarm, exposing the internal operating mechanism thereof,Fig. 2 is a cross sectional View taken on the line 2 2 of Fig. 1 andlooking in the direction indicated by the arrow at, Fig. 3 is afragmentary cross sectional View taken on the line 22 of Fig. 1 lookingin the direction indicated by the arrow 6, Fig. t is a cross sectionalview on the line 44 of Fig. 1, and Fig. 5 is a detail view of thegoverning mechanism employed for regulating the speed of the signalsounding mechanism.

Referring more particularly to the drawings, 1 designates the protectivecasing of the fire alarm, which casing has a shaft 2 journaledtransversely thereacross, which shaft has a coil spring 3 mounted uponone end thereof. The coil spring 3 is connected to the shaft 2 in such amanner that when the shaft is manually rotated by the handle 4thereupon, the spring will be wound. The shaft 2 has a gear .5 mountedthereupon,

ing rod 10 connected to its vertex.

which gear meshes with the pinion 6. The pinion 6 is carried by theshaft 7, which shaft isjournaled transversely across the supportingcasing 1, and has its terminal ends seated in brackets 8, which aresecured to the opposite sides of the supporting casing. The shaft 7 hasa crank portion 9 formed therein, which crank portion has a connect- Theconnecting rod 10 is also connected to the crank handle 11 of the shaft12. The shaft 12 is supported within the casing 1 by brackets 13 and 14,the bracket 14!: being suspended from the upper wall of the casing 1.The shaft 12 has a bell clapper 15 secured thereto, which bell clapperprojects out of the uppermost side of the casing and is adapted forstriking engagement against the bell 16, for sounding an alarm.

A bracket 17 is secured to one side of the casingl, and it has a lever18 pivotally mounted upon its outer terminal end, which lever has oneend positioned for engagement with the teeth formed upon the peripheryof the gear 5 for restraining the gear 5 from rotation. The lever 18 hasa spring 19 connected to'its upper end, which spring is secured to thebracket 17, and tends to hold the end of the lever out of engagementwith the peripheral teethof the gear 5. A cord 20 is secured to theopposite end of the lever 18 from the end which engages the teeth of thegear 5 and extends out through the casing and is positioned aboutvarious rooms of a house. The cord 20 is formed of any suitable type ofmaterial which is fusible by heat, so that when a fire breaks out in thehouse the cord will be severed or melted by the heat, and this willrelease the lever 1S from restraint, permitting the spring 19 to movethe lever upon its pivotal point and out of engagement with the teeth ofthe gear, which will permit the gear 5 to be rotated by the unwindingaction of the coil spring 3. When the gear 5 is rotated by the unwindingof the coil spring 3, the rotation thereof will be imparted to the shaft7 through the meshing engagement of the gear with the pinion 6. Therotary motion of the shaft 7 will be imparted to the shaft 12 in avibratory or oscillatory manner, through the connection of theconnecting rod 10 and the crank portions 9 and 11, Which motion willcause the clapper arm 15 to vibrate against the sides of the bell 15 forsounding an alarm.

The cord 20 has springs 21 interposed therein, which springs will takeup the slack in the cord, holding it taut at all times so that it willproperly hold the lever 18 positioned for engagement with the teeth ofthe gear 5 except when the cord is severed by a fire.

The shaft 12 has a governing arm 22 mounted thereupon, which governingarm has a balancing ball 23 positioned upon one end and a pair oftransversely extending friction shoes 24 and 25 formed upon the otherend, which shoes are positioned diametrically opposite to each otherabout the periphery of the friction drum 26, which is mounted upon theshaft 7. Upon the vibratory or oscillatory movement of the shaft 12, thegovernor 22 will be oscillated, causing the brake shoes 24 and 25 tointermittently engage the periphery of the friction drum or wheel 26,thereby retarding the rotation of the shaft 7 and the unwinding of thespring 3 for increasing the length of time of the sounding of the alarm.

From the foregoing description, taken in connection with theaccompanying drawings, the advantages of the construction and of themethod of operation of the improved fire alarm will be readily apparentto those skilled in the art to which this invention appertains, and,While in the foregoing the principle of the operation has beendescribed, together with various features of construction, it is to beunderstood that certain minor features of construction, combination, andarrangement of parts may be altered to suit practical conditions,provided such alterations are comprehended within the scope of what isclaimed.

What is claimed is a In a fire alarm, a casing, a shaft journaledtransversely through the casing at its lower end, a coil spring at oneend of said shaft, means for rotating the shaft at its opposite end, agear wheel mounted on said shaft and disposed within the casing, asecond shaft journaled within the casing, a pinion at one end of saidsecond shaft, a crank portion formed at the opposite end of the secondshaft, said pinion meshing With the gear carried by the first mentionedshaft, a third shaft journaled in the upper portion of said casing andconnected to the second shaft by a connectingrod at its outer end, thefreeend of the connecting rod secured to the crank portion of the secondshaft, a friction drum centrally mounted on'the second shaft, and meansmounted on the third shaft for engaging the friction drum to regulatethe speed of rotation of the same, a bell clapper secured to the thirdshaft and extending up Wardly through the top of the casing, a bell oversaid bell clapper, means in the lower portion of the casing adapted toengage the teeth of the gear of the first mentioned shaft to prevent thesame from rotating, a flexible means connected to the first mentionedmeans for holding the same in engagement with said teeth for preventingthe same from rotating.

In testimony whereof I aflix my signature in presence of two Witnesses.

HARRY H. BROWN. Witnesses J. C. CARRIER,

J. G. SAssI.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, I). G.

